TSPY_ZBOT.HMM
PWS:Win32/Zbot (Microsoft); PWS-Zbot.gen.hb (McAfee); Trojan.Gen.2 (Symantec); Trojan-Spy.Win32.Zbot.cmfd (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.6839779 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
188,416 bytes
EXE
Yes
16 Nov 2011
Arrival Details
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This spyware creates the following folders:
- %User Profile%\Application Data\Amopu
- %User Profile%\Application Data\Kuupp
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{E7CDAA57-F831-845D-41B7-A74A2800F7A2} = ""%User Profile%\Amopu\atug.exe""
Other System Modifications
This spyware deletes the following files:
- %User Profile%\Kuupp\epofy.tmp
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Diputa
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Diputa
Honeobwob = {random values}
HKEY_CURRENT_USER\Software\Microsoft\
Diputa
Sauxi = {random values}
Dropping Routine
This spyware drops the following files:
- %User Profile%\Amopu\atug.exe
- %User Profile%\Kuupp\epofy.oli
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Other Details
This spyware connects to the following possibly malicious URL:
- http://{BLOCKED}ywifepal.ru/ves/hej.ls
- http://www.{BLOCKED}e.com/webhp
- http://{BLOCKED}inetecs.ru/pla/folsk.php
- http://{BLOCKED}ywifepal.ru/pla/folsk.php
It deletes the initially executed copy of itself
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restart in Safe Mode
Step 3
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft
- Diputa
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
- Privacy
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {E7CDAA57-F831-845D-41B7-A74A2800F7A2}=""%User Profile%\Amopu\atug.exe""
- In HKEY_CURRENT_USER\Software\Microsoft\Diputa
- Honeobwob={random values}
- In HKEY_CURRENT_USER\Software\Microsoft\Diputa
- Sauxi={random values}
Step 5
Search and delete these folders
- %User Profile%\Application Data\Amopu
- %User Profile%\Application Data\Kuupp
Step 6
Search and delete these files
- %User Profile%\Amopu\atug.exe
- %User Profile%\Kuupp\epofy.oli
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ZBOT.HMM. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
Step 8
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again. %User Profile%\Kuupp\epofy.tmp
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